Sharpening device.



J. W. GRABILL. SHARPENING DEVICE.

APPLICATION FILED MAY 31, 1910.

987,862, Patented Mar. 28, 1911.

JOHN W. CRABILL, OF PLATTSMOUTH, NEBRASKA.

SHARPENING- DEVICE.

Specification of Letters Patent.

Patented Mar. 23, 1911..

Application filed May 31, 1910. Serial No. 564,105.

To all whom it may concern:

Be it known that I, Jenn V. GRABILL, a citizen of the United States,residing at Plattsmouth, in the county of Cass and State of Nebraska,have invented certain new and useful Improvements in Sharpening Devices, of which the following is a specifica' tion, reference being badto the accompanying drawings.

My invention relates to improvements in sharpening devices of that classused for sharpening or pointing jewelers peg wood, pencils, and thelike.

The object of my invention is to provide a simple and practical deviceof this character having yieldably mounted cutting blades or knives,arranged in converging relation, and improved means for mounting orsecuring the body of the device on a work bench, table or desk.

lVith the above and other objects in view,

he invention consists of the novel features of construction and thecombination and arrangement of parts hereinafter fully described andclaimed and illustrated in the accompanying drawings in which,

Figure 1 is a perspective view of my im proved sharpening device,showing it mounted on a support in accordance with the invention. Fig. 2is a sectional view through the parts shown in Fig. 1. Fig. 3 is an endview of the body of the device, Fig. 4: is a perspective view of thesupport shown in Fig. 1, and Fig. 5 is a perspective view of theretaining plate for the pivots of the two knives.

My improved sharpening device comprises a body 1 preferably of U-shape,and formed by bending a metal plate as shown in Fig. 1 to provide a baseportion, and two upright side portions or plates 3. Within the U shapedbody 1, are two cutting blades or knives 4: arranged in downwardlyconverging relation and secured at their upper longitudinal edges to apair of pivots or rock shafts 5, 6, mounted in the sides 3 of the bodywhereby the lower beveled cutting edges of the knives may swing towardand from each other. To permit the knives a to swing in unison orsimultaneously, the pivots 5, 6, have fixed to their projecting ends,radially rojecting arms 7 which latter are oppose to each other and havetheir opposing ends formed with the meshing gear teeth 8. The two knivesare actuated toward each other by a spring 9, constructed of a piece ofresilient wire bent to form a coil and having one of its ends 10 bent atright angles and inserted in a transverse opening in one end of theshaft while the other end of said spring is bent to provide an angularportion 11, and terminates in an angularly projecting end portion 12,which is inserted in a transverse opening in the corresponding end ofthe other pivot 6, as clearly shown in Fig' 3. By constructing andarranging the spring in this manner, it will be seen that when a peg,pencil or other object is inserted between the two cutting blades, theywill be spread apart by it against the tension of the spring, and whenthe object is removed, the spring will return the knives or blades totheir normal position, shown in Fig. 2.

In order to permit the knives to be readily resharpened they areremovably mounted in the body 1, by making inverted T-shaped slots 13 inthe upper ends of the sides 3. The cross portions of said slots are horizontally disposed and have rounded ends in which the pivots or shafts 5,6, are mounted for rotation. The vertical upper portions of the slots 13permit the pivots to be readily inserted in and removed from the body 1,and when said pivots are arranged in the slots, they are retained in theends of the cross portion of the same by the meshing arms 7, and also bya retaining plate 14, provided at the opposite end of the body 1. Thisplate 1 1 is arranged between the spring 9 and the adjacent side 3 ofthe body, and has at its ends semi-circular shaped notches 15 whichreceive the pivots 5, 6. It will be seen that by moving the ends 10, 12of the spring from the transverse openings in the two pivots, theretaining plate 14 may be readily removed, and after this has been done,the pivots 5, 6, and consequently the two knives may be readily liftedout of the body 1.

Any means may be provided for securing the body of the device to asupport, but I prefer to removably mount the device on top of a workbench, table, desk or other support, indicated at 16, by providing uponthe latter an anchoring block 17. This block may be screwed or otherwisesecured at one of its ends on the support 16, and has the bottom face ofits other end recessed as shown more clearly in Fig. 4;, for thereception of the base portion 2 of the body 1,

and to provide a projecting tongue 18 which fits in the said bodybetween its upright sides 3.

Then the device is applied to the recessed end of the anchoring block,17 as shown in Figs. 1 and 2, it will be securely held on the table orother support 16, but at the same time, may be readily removed byslipping it off the tongue 18. The latter is disposed directly beneaththe knives 4, and is preterably formed with a recess or opening 19 whichreceives the shavings cut by the knives. If desired, the upper face ofthe tongue 18 may be grooved longitudinally as shown at 20, and the baseportion 2 of the body of the device may be formed with an opening 21arranged beneath the opening 19 in the tongue when the device is appliedto the support as shown in Fig. 2.

In using the device, the peg or stick of Wood, the pencil or otherobject to be sharpened or pointed, is inserted between the knives 4E andthen withdrawn so that the said knives will cut or shave oii a portionof the object, By repeating this operation, and varying the angle of theobject as it is withdrawn from between the knives, the object may betapered or pointed or given any desired sh ape. hen the cavity oropening 19 in the retaining block becomes filled with shavings thedevice may readily be slipped off of the block to permit the cavity tobe cleaned. Likewise when the knives 4: become dull, they may be readilyremoved and sharpened.

I claim z- 1. In a sharpening device of the class described, thecombination of a body, a pair of swinging knives having pivotal axesmounted in the said body, connections between the pivotal axes of theknives to cause the knives to move simultaneously to ward or from eachother, and springs acting on the pivotal axes of the knives to normallydispose the knives in converging relation to each other.

2. A sharpening device of the character described, comprising a body, apair of pivots removably mounted therein, opposing cutting knives fixedto said pivots and arposed on the ,on the base, and

ranged in converging relation, co-acting means on the two pivots forcausing them to rock in unison, and a spring for actuating the pivots tomove the knives toward each other.

3. A sharpening device of the character described, comprising a U-shapedbody, a pair of pivots mounted therein, opposing knives fixed to saidpivots and arranged in converging relation, arms on said pivots at oneend, provided with meshing teeth, and a coil spring having angular endsfixed to the opposite ends of the pivots, as and for the purpose setforth.

4. A sharpening device of the character described, comprising a U-shapedbody having a base, and upright side portions the latter being formed attheir tops with inverted T-shaped slots, a pair of pivots removablyarranged in said slots, opposing knives fixed to said pivots, co-actingmeans on said pivots to cause them to rock in unison, a notchedretaining plate between the opposite ends of the pivots, and a springfor actuating the pivots to move the knives toward each other.

5. In a sharpening device of the class described, the combination of abase, a U- shaped body having its centralportion disbase, an anchoringmember having a tongue bearing on said central portion of the U-shapedsupport, said tongue and said central portion of the U shaped supporthaving coincidento-penings, a pair of cutting knives having pivotal axesmounted in the sides of the said U-shaped support, connecting meansbetween the pivotal axes of the knives to cause the knives to movesimultaneously in reverse directions, and a spring act-ing on the knivesto normally dispose them in converging relat1on to each other and abovethe said open- 5 mgs.

In testimony whereof I hereunto affix my 1 signature in the presence oftwo witnesses.

JOHN "W. CRABILL.

WVitnesses Dona TIDD, ABRAHAM L. Tron.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. 0.

